Bolster.



G. I.V KING. BULS'EE-B.

(Application led'ug'. 22, 1901.)I

me nomma wams co. Puorauwo.. wmwsToN. in. c.

Patented Uct. 29, `|901.

NITRD STATES PATENT MOFFICR';

GEORGE I. KING, or DETROIT, MICHIGAN, ASSIGNOR To AMERICAN CAR a FOUNDRYCOMPANY, or Sr. LOUIS, MISSOURI, A CORPORATION on New JERSEY.

ABOLSTER.

SPEGIFIGATION forming part of Letters Patent No. 685,453, dated ctobr29, 1901.

Application filed August 22, 1901. Serial No. 72,927. (Ndmodel.) I

To all whom t may concern.:

Be it known that I, GEORGE I. KING, a citi zen of the United States,residing at the city of Detroit, county of Wayne, State of Michigan,have invented a certain new and useful Improvement in Bolsters, of whichthe following is a full, clear, and exact description, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, forming partof this specification, in which- Figure 1 is a side elevational view ofmy improved bolster, one end being Shown in section. Fig. 2 is a topplan view of the same, partly in horizontal section. Fig. 3 is anenlarged cross-sectional View on line 3 3, Fig. l; and Fig. 4 is across-sectional View on line 4 4, Fig.

This invention relates to a new and useful improvement in bolstersespecially designed for use in connection with car-trucks.

The objects of the invention are to simplify the construction ofbolsters of the character described, enabling the employment of aminimum amount of material for the production of a strong and rigidbolster.'

Another Objectis to use structural and rolled members, whereby the partsare easily assembledand repairs can be quickly made.

A further object is to enable the employment of a machine-riveter in theassemblage of the parts, thereby facilitating and reducing the cost ofmanufacture.

With these objects in view the invention consists in the constructiomarrangement, and combination of the several parts, all as willhereinafter be described and afterward pointed out in theclaims.

In the drawings I have shown a type of bolster commonly known asboX-girder form in which commercially-rolled members are employed, thebolster being what is known as a built-up structure. The essential ormain members of the bolster are preferably plates, which are connectedtogether by suitable angles or Z-bars, so as to produce the most rigidstructure. The bolster as an entirety is deepest at its middle portion,the top plate 5o carrying the usual center and side bearings.

he side web-plates are provided with the usual column-guides, and undereach end of the bolster separate spring-seats may be provided, ifdesired, or the springs may be seat ed directly against the bottomcover-plate.

In the drawings, A indicates the vertical side webs, 'which arepreferably composed of plates, said webs being deepest at their middleportion and shallow at their ends. The upper edges of these plates maybe straight, as shown, or they may be slightly crowned, and to theseupper edges are secured the legs of Z-bars B.

C indicates the top plate of the bolster, which is preferably wider thanthe distance between the side webs, the projecting edges of said platebeing riveted to the webs of the Z-bars B. The outer legs'of the Z-barsare preferably presented upwardly, as shown in Fig. 3.

D indicates 2 -bars arranged along the lower outer edges of the verticalside webs, said Z-bars being preferably bent to conform to the shape ofsaid lower edges of the vertical side webs. These Z-bars have one oftheir legs riveted to the lower edges of the vertical side webs, whilethe webs of the Z- bars extend horizontally in a lateral direction andhave riveted to them the projecting edges of the bottom cover-plate E.`The outer legs of the Z-bars D are presented down- Vwardly, as shown.

Referring to Fig. l, it will be observed that the inner legs of theZ-bars approach each other at the ends of the bolster, and between theZ-bars, at proper places, are arranged column-guides F. Thesecolumn-guides are preferably in the form of malleable castings madehollow, so that the rivets may be driven through the castings to holdthe same in position. The function of these column-guides is so wellunderstood that it is deemed unnecessary to enter into a detaileddescription of?" the same here.

' G indicates stiffening-angles, preferably arranged vertically and inthe vertical plane of the center plate. These stiieningiangles may beriveted to the vertical webs of the bolster throughout the whole or aportion of their length, these serving to strengthen the structure atits center, Where the center bearing is located.

roo

It will be noted with respect to the above construction that it followsgenerally the form of a box-girder. The bolster being deepest at itsmiddle portion enables the shallow ends to be supported by springs inthe usual manner. The top cover-plate of the bolster is in compressionunder load, while the bottom cover-plate is in tension. The Z-barsarranged at the upper edges of the bolster are likewise placed incompression, While the Z- bars at the lower edges of the bolster are intension. The vertical web-plates serve to a certain extent asplate-girders, and in this manner a most rigid and strong bolsterisproduced.

So far as I am aware I am the rst to employ Z-bars in the manner hereinshown and described, said Z-bars being combined and arranged asconnection members for the top and bottom cover-plates and the verticalwebplates.

I am aware that minor changes in the construction, arrangement, andcombination of the several parts of my device may be made andsubstituted for those herein shown and described without in the leastdeparting from the nature and principle of my invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a truck-bolster, the combination with vertical web-plates, of topand bottom coverplates, and Z-bars for connecting said webplates andsaid cover-plates, substantially as described.

2. In a truck-bolster, the combination with the web-plates made deepestat their middle portions, of top and bottom cover-plates, and Z-bars forconnecting said cover-plates to said web-plates, substantially asdescribed.-

3. In a truck-bolster, the combination with the web-plates, of top andbottom cover-plates,

Z-bars to which said web-plates and coverplates are connected, andcolumn-guides arranged between the webs of the Z-bars at the ends of thebolster, substantially as described.

4. In a bolster for car-trucks, the combination with the web-plates, oftop and bottom wcover-plates, Z-bars forming connections be- GEORGE I.KING.

Witnesses:

GEORGE BAKEWELL, GALES P. Moons.

